398684760 has 64 divisors (see below), whose sum is σ = 1248065280. Its totient is φ = 101692800.

The previous prime is 398684753. The next prime is 398684789. The reversal of 398684760 is 67486893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69466 + ... + 74985.

It is an arithmetic number, because the mean of its divisors is an integer number (19501020).

Almost surely, 2^398684760 is an apocalyptic number.

398684760 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398684760 is an abundant number, since it is smaller than the sum of its proper divisors (849380520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398684760 is a wasteful number, since it uses less digits than its factorization.

398684760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144488 (or 144484 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 398684760 is about 19967.0919264674. The cubic root of 398684760 is about 735.9978487256.

The spelling of 398684760 in words is "three hundred ninety-eight million, six hundred eighty-four thousand, seven hundred sixty".